mmmappajoos

Hi, I'm going to be replacing the spark plugs and wires on my 84 GSL-SE soon and I need to know a few things before making any purchases:

Are NGK BR10EIX "racing" spark plugs okay to use in a non-ported 13B-RESI? When I got the car I never bothered to ask the owner if he had the rebuilt motor streetported or not, so I'd like to play it safe.
If not, then 7 heat rating spark plugs the ones to use? I drive at relatively high RPM.
Is Racing Beat bullsh*tting when they say the $110 thin wall socket is required for spark plug removal and replacement?

Thanks in advance.

GSLSEforme

What engine is in your car,is it the original engine and original ignition system?

mazdaverx713b

iTrader: (91)

I would personally only use NGK BR8EQ-14 spark plugs. They are excellent and there is no advantage to using anything different in a stock or mostly stick engine. Even the original Diamond coils outperform the aftermarket stuff. A thin wall socket is not required but if you have one, you get more of an even bite on the spark plug and the risk of slipping off the plug when torquing is reduced.

GSLSEforme

Another reason to stick with BR8EQ14 plugs is they are meant to work with stock ignition system.
Installing other plugs meant for 2nd, 3rd gen RX7s causes problems as the 1st gen in comparison to later models has the weakest ignition system and it struggles to fire the other type spark plugs which can lead to poor performance,misfiring,fouling of plugs.
No reason to run a cooler heat range plug in this engine in stock form,there is no benefit.

t_g_farrell

iTrader: (1)

It sure depends on your engine and as GSLSErorme says, the ignition. I use RX8 plugs but have a much hotter ignition setup.

mmmappajoos

I actually do believe it’s a street ported GSL-SE 13b with the original ignition system. Does the port change anything or should I just go with the standard spark plugs?

GSLSEforme

Being it’s an original SE use what it came with from factory,BUR8EQ14, no reason to deviate from that plug-no gains will come from substituting something else in hopes of more power.
You can’t drive it hard enough to require a colder spark plug.
The stock SE ignition is not powerful enough to fire those plugs you had listed in your 1st post.
The engine will run less than satisfactory with any other than what is supposed to be put in it.

Like TG I have a more powerful hand built ignition and run other plugs to take advantage of hotter spark for better starting and driveability.

GSLSEforme

If you’re not sure what you have engine wise,post a couple pics of your engine here and we can tell you.

DreamInRotary

iTrader: (49)

NGK BR8EQ-14's and call it a day.